linux-kernel - Re: [PATCH AUTOSEL for 4.14 078/100] kmemleak: add scheduling point to kmemleak

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Date:   Wed, 24 Jan 2018 17:24:32 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     Yisheng Xie <xieyisheng1@...wei.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Michal Hocko <mhocko@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Linus Torvalds" <torvalds@...ux-foundation.org>
Subject: Re: [PATCH AUTOSEL for 4.14 078/100] kmemleak: add scheduling point
 to kmemleak_scan()

On Wed, Jan 24, 2018 at 03:46:27PM +0800, Yisheng Xie wrote:
>Hi Sasha,
>
>There is a fix patch for this patch:
>
>  13ab183 mm/kmemleak.c: make cond_resched() rate-limiting more efficient
>
>So if this patch is backported to stable, maybe the above patch is also
>need to be backported too.

Hi Yisheng,

This patch fixes a softlockup, while the patch you linked seems like
an performance optimization for this patch, so I'd rather skip it
unless you're aware of an actual issue it might fix.


--
Thanks,
Sasha